File _service:tar_git:1013-core-Use-XDG_RUNTIME_DIR-only-if-owned-by-us.patch of Package pulseaudio

From 82957a704331f5fac13a7550e66fd86114ef5458 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juho=20H=C3=A4m=C3=A4l=C3=A4inen?=
 <juho.hamalainen@tieto.com>
Date: Fri, 15 Aug 2014 12:30:00 +0300
Subject: [PATCH 1013/1015] core: Use XDG_RUNTIME_DIR only if owned by us.

If for some reason XDG_RUNTIME_DIR points to runtime dir not owned by
our uid, fail. Having wrong XDG_RUNTIME_DIR is especially bad with root,
since then the pulse runtime directory's ownership is changed,
preventing clients from connecting etc bad things.
---
 src/pulsecore/core-util.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/pulsecore/core-util.c b/src/pulsecore/core-util.c
index 0d9e354..83cd40d 100644
--- a/src/pulsecore/core-util.c
+++ b/src/pulsecore/core-util.c
@@ -1789,6 +1789,13 @@ char *pa_get_runtime_dir(void) {
     /* Use the XDG standard for the runtime directory. */
     d = getenv("XDG_RUNTIME_DIR");
     if (d) {
+#ifdef HAVE_FSTAT
+        struct stat st;
+        if (stat(d, &st) == 0 && st.st_uid != getuid()) {
+            pa_log("XDG_RUNTIME_DIR (%s) is not owned by us (uid %d), but by uid %d.", d, getuid(), st.st_uid);
+            goto fail;
+        }
+#endif
         k = pa_sprintf_malloc("%s" PA_PATH_SEP "pulse", d);
 
         if (pa_make_secure_dir(k, m, (uid_t) -1, (gid_t) -1, true) < 0) {
-- 
1.9.1